Standard Roof Plywood Thickness

Sheathing should be a minimum of 19 32 inch thick.

Standard roof plywood thickness.

This kind of plywood can be used on roofs with minimal load. However you might find that osb can better suit your needs than plywood for the roof. Tolerance for utility grade thickness is 1 32 inch and for cabinet grade plywood 1 64 inch. Most of plywood sheets available in different thicknesses.

Steeper rather than flatter roofs will have lesser load per sq. Chart represents most common plywood sheet sizes in inches imperial system and millimeters metric dimensions. The thickness of plywood used for roof decking depends on the roof slope the spacing of rafters and the weight of other material to be put over the decking as well as the design load the. The ideal thickness for the standard rafter spacing of 24 inches is 5 8 th of an.

You can use a caliper to measure the thickness as showing in above photo. In the photo the caliper reads 17 75mm. Even though with all variation often 3 4 19 mm nominal 23 32 thickness tongue and groove. A standard sheet of plywood is 4 8.

Thickness tolerance is allowed in all plywood standards like iso us and european plywood standard jpic china plywood standard measuring the plywood thickness. The typical thickness range for sheathing is 3 8 to 3 4 inch. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. The minimum thickness of plywood used for roofing is 3 8 th of an inch.

Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. 30 years on it s working out fine. 8d ring shank nails should be used instead. Never attach roof sheathing with staples.

Osb and plywood come in thicknesses ranging from 5 16 to 3 4 inch and the thickness needed for a particular roof depends on several factors including rafter spacing expected load and roof design. Plywood thickness for the roof. Its size tolerances especially for thickness are smaller that those for the utility grade plywood used in the building trades for roof and wall sheathing subfloors and general use purposes. Because of its construction some manufacturers actually make larger sheets of osb.

Softwood plywood typically used for rough framing comes in 4 x 8 feet 1220 x 2438 millimeters sheets. You just need to multiply the length by the width. How many square feet are there in a 4 8 sheet of plywood. If the roof dips here and there because of the thin plywood the 1 8 jump may no be so bad in the mix of it all jack jul 26 16 at 4 24 here in snow country 1 2 osb is standard with 7 16 being common for walls.